Looks like Granit Xhaka (Arsenal) is struggling after picking up a knock. Hopefully he can run it off.
Chelsea decide to take a short pass from the free kick and the attacking effort continues.
Matteo Guendouzi (Arsenal) makes a rough challenge and Anthony Taylor blows his whistle for a foul. That's a free kick to Chelsea.
Eden Hazard (Chelsea) produces a lovely ball into the penalty area but the defender manages to intercept and comfortably averts the danger.
Sead Kolasinac (Arsenal) strikes a powerful volley towards goal, but one of the defenders blocks his attempt. The ball is out of play. Arsenal will have a throw-in.
Here is a change. Pedro is going off and Maurizio Sarri gives the last tactical orders to Callum Hudson-Odoi (Chelsea).
Eden Hazard (Chelsea) takes the ball to the corner flag and sends it into the box.
Jorginho (Chelsea) takes the corner and sends it into the penalty area, but the opposition's defence is ready and makes a good clearance. Chelsea get a corner.
Eden Hazard (Chelsea) shows off his amazing technique to get to the edge of the box by himself. He pulls the trigger but sends the ball into the stands. Nice run, but poor finish!
A pass by Eden Hazard (Chelsea) ends up in no man's land, and the attacking effort comes to an end.
Hector Bellerin (Arsenal) is being substituted because of an injury. Unai Emery sends Mohamed Elneny on the pitch.
Hector Bellerin (Arsenal) is clearly asking for some medical attention with his painful gestures. The extent of his injury is yet to be discovered.
The substitution is prepared. Olivier Giroud (Chelsea) joins the action as a substitute, replacing Willian.
Unai Emery decides to make a substitution. Alexandre Lacazette will be replaced by Alex Iwobi (Arsenal).
Ainsley Maitland-Niles (Arsenal) joins the action as a substitute, replacing Aaron Ramsey.
Ross Barkley (Chelsea) takes a first-time shot from the edge of the box, but his effort is well blocked by the defender.
The ball is whipped in from the corner by Lucas Torreira (Arsenal), but one of the defenders gets it clear.
Hector Bellerin (Arsenal) fails to send a pass into the box as his effort is cut out. The ball is out of play. A goal-scoring opportunity from a corner for Arsenal.
Lucas Torreira (Arsenal) fails to deliver a decent free kick and the ball goes out of play.
Here comes a substitution. Ross Barkley (Chelsea) is brought on as a substitute for Mateo Kovacic.
Jorginho (Chelsea) carelessly slides into the feet of his opponent and he'll be lucky to avoid punishment. Anthony Taylor blows for the foul but keeps his cards in his pocket on this occasion. It's a free kick to Arsenal, but they probably won't attempt a direct shot on goal from here.
Willian (Chelsea) gets on the end of a pass on the edge of the box but his shot is blocked.
Marcos Alonso (Chelsea) picks up a rebound after a melee on the edge of the box. His first-time shot is poor, though, and curls well wide of the right post.
Pedro (Chelsea) got the ball on the edge of the box and fired in a first-time shot on goal, but his effort floated well over the bar. High, wide and not at all handsome.
One of the defenders reacts at the last minute to brilliantly block a pass from Cesar Azpilicueta (Chelsea).
Willian (Chelsea) receives a precise pass outside the penalty area and strikes the ball goalwards. His attempt only finds one of his teammates, though, and ricochets away off him.
Mateo Kovacic (Chelsea) sends a long ball across the pitch, but it misses its target.
Sead Kolasinac (Arsenal) is forced to stop his forward run after being caught in an offside position by the linesman.
The referee blows his whistle to signal the start of the second half.
There will be nothing more to see in the first half. The whistle blowing of Anthony Taylor has ended it.
Eden Hazard (Chelsea) takes the free kick and sends the ball into the penalty area. The opposition's defence outnumbers the attacking players inside the box and they manage to make a clearance.
We will have 2 min. of added time.
A cross arrives in the goalmouth from the resulting corner kick. Marcos Alonso (Chelsea) outjumps the defence, but his promising header bounces away off the left post!
Willian (Chelsea) will take a corner kick.
Antonio Rudiger (Chelsea) times his run into the box perfectly and slams a header goalwards from the centre of the box, but it lacks accuracy and flies well wide of the left post.
Willian (Chelsea) is about to take a corner kick.
Eden Hazard (Chelsea) delivers a long ball, but it lacks enough power to reach his teammates and is intercepted by one of the defenders. Chelsea force a corner. Their opponents will face another attacking threat.
Aaron Ramsey (Arsenal) races towards goal but the defender gets back well to make a challenge.
Laurent Koscielny (Arsenal) displays good awareness in the six-yard box and finds an unusual way to score by using his body to knock the ball behind the keeper. He makes it 2:0.
Pierre-Emerick Aubameyang (Arsenal) receives a lofted pass from the flank and shoots from close range, but the ball flies slightly wide, almost brushing the right-hand post.
David Luiz (Chelsea) has tested the patience of referee Anthony Taylor and goes into the book for a previous late challenge. Arsenal have a free kick.
We can have a look at the statistics now, particularly the total attempts – 9:3. Shots on target – 4:0.
Lucas Torreira (Arsenal) puts a poor free kick into the box that Kepa Arrizabalaga easily collects.
N'Golo Kante (Chelsea) jumps into a tackle and Anthony Taylor blows his whistle for a foul. Arsenal are awarded the free kick.
Willian (Chelsea) attempts to find a teammate with the corner, but the effort is snuffed out by the goalkeeper.
Marcos Alonso (Chelsea) tries to send a low pass into the box, but it's blocked and cleared. The ball goes out of play. Chelsea are awarded a corner kick.
Aaron Ramsey (Arsenal) gets into a good scoring position. He creates some space for himself and tries his luck from distance. His decent effort towards the underside of the crossbar is, however, superbly saved by Kepa Arrizabalaga!
Wonderful movement by Arsenal. The players are holding possession, mostly exchanging one-touch passes. They control the pace of the game now.
Jorginho (Chelsea) got the ball on the edge of the box and smashed a first-time shot, but his effort flew high over the crossbar.
Alexandre Lacazette (Arsenal) beats a defender on the edge of the box then bends in an effort at goal, but his radar is way off and the ball sails high over the bar.
Willian (Chelsea) quickly takes the corner kick with a short pass.
Cesar Azpilicueta (Chelsea) wastes a good opportunity as his pass into the box is blocked by the defence. Chelsea win a corner.
David Luiz dinks a lofted pass into the path of Pedro (Chelsea) inside the box, but his drive sails a whisker past the right post.
Pierre-Emerick Aubameyang (Arsenal) gets inside the penalty area and sends a powerful shot that almost ends inside the net. The keeper is alert and makes a good save.
Lucas Torreira (Arsenal) fails to pick a body out in the box with an over-hit chip pass.
Goal! Hector Bellerin displays great vision and sends a pass to Alexandre Lacazette (Arsenal), who shows brilliant composure inside the box to bury the ball into the top right corner. The score is 1:0.
Granit Xhaka (Arsenal) takes the corner with a short pass.
Lucas Torreira (Arsenal) decides to take a short corner instead of crossing into the box.
Laurent Koscielny (Arsenal) creates himself some space inside the goalmouth and connects with the resulting free kick. His header would have probably ended up in the middle of the goal, but Kepa Arrizabalaga pulls off a superb reflex save to thwart him. Arsenal will have a chance to score from a corner kick.
Granit Xhaka (Arsenal) is going to send the ball in from the free kick.
Anthony Taylor blows his whistle for a foul after Pedro (Chelsea) hacks down one of his opponents. Arsenal have a free kick.
A cross into the box picks out Eden Hazard (Chelsea), who steps inside his marker and fizzes a shot well wide of the right post.
What a wasted chance that was! An inch-perfect cross into the box finds Sokratis (Arsenal) who sends his header well wide of the right post.
A horde of players are waiting inside the penalty area for a cross from the corner, but Lucas Torreira (Arsenal) takes it short.
Granit Xhaka (Arsenal) produces a dangerous lofted cross into the box which is intercepted. The ball goes behind for a corner. Arsenal will have an opportunity to threaten the opposition's goal.
This corner kick is taken with a short pass by Lucas Torreira (Arsenal).
Aaron Ramsey (Arsenal) sees an unmarked teammate and attempts to send him a low pass. However, one of the defenders reads the game perfectly and averts the danger. Arsenal force a corner. They send men into the box.
Alexandre Lacazette sprays a pass out to Pierre-Emerick Aubameyang (Arsenal), but he produces a poor effort from inside the box which goes well wide of the left post.
Granit Xhaka (Arsenal) produces a poor lofted pass into the penalty box. His attempt is easily thwarted by the defence.
The ball is cleared after Alexandre Lacazette (Arsenal) attempted to dribble past an opposing player.
The first half has just begun.
Arsenal will kick the game off.
Anthony Taylor will officiate today.
Hello and welcome to our live text commentary! We will provide you with instant updates of everything that happens in the match. The starting lineups will be announced very soon.